Hydraulic shock absorber for motor vehicles



.9 192 A 1,638,777l Agg 7 w. P. MASON w A l HYDRAULIC sHcK ABSORBER FOR MOTOR vEHILEs l vFiled oct.. 2z, y192s 2 Sheets-sheet 1 Aug. 9, 1927.

W. P. MASON HYDRAULIC SHOCK ABSORBER FOR .MQTOR VEHICLES Filed oct; 23. 192ssheets-sheet 2A a?. `@72m u armenews",

l WILLIAM :PATRICK MASON, or

Patented Aug. i 9, 1927.l

Unirse srA AssICNoR or ONE-HALE' To TRALIA..

NEW MILE END, soUTH AUSTRALIA, AUSTRALIA, NoRMANsAI/IUEL SPENCER, or ADEIAIDE, AUs- HYDRAULIC s'Hoox ABsoRBER EoRMoToR VEHICLES.

Application filed October 23', 1926, Serial No. 143,662, andvin Australia June 15, 1926.

The purpose oi this invention is rto provide an improved device inthe form of an hydraulic shock absorber that not onlywill 'check'the rebound of the spring o'f a motor the rear axle and springs.

v may vehicle'as it comes back to normal position after displacement` but which, when. desired,

may be utilized to assist the spring. to check the .downward movement of the vehicle body( My device may be applied either to the front or to the rearaxles and springs but is particularly designed for application to A separate device be applied to'. each spring, oron'e may be provided at the centre ot the rear axle to control both springs.

My device vvcomprises a circular drum, and a spindlel mounted within and projecting from the centre a. block having two through passages, the one a small one of adjustable bore and the other a large one fitted with a ball valve and with adevice whereby it may be wholly or partially closed, and the central spindle car- 'r'ying-a plain radial plate. The block and the plate. divide the interior of the drum into two chamberswhich va'ry in relative sizeas the spindle with the plate oscillates within the drum. lThe one chamber serves as a compression chamber, the other as a- 4storage chamber.

, .same with reference Secured to and projecting from the drumy and. from lthe spindle. are two arms the' outer. ends of whicharerpivotally attached respectively to the axle or to the spring and to the frame of the vehicle according to the construction of the vehicle and to the posi, tionof the device, so that as the axle and spring move up `and down relatively to the frame the spindle and the drum oscillate relatively the one to the other. f In orderithat my inventi' n may be the "more clearlyunderstood I will describe the to the accompanying 'drawings in which .l

Fig. 1 is a side View showing portion of a chassis and a spring with my shock absorber attachedthereto.

` Fig. 2 is what may. be 1 of the preferred form of the two arms whereby called a front view my device without v spindle respectively are attached.l

of the drum andV adapted to oscillate therein, the drumbeing litted with see Fig. 10--whereby ythe drum is the drum and theA of the device with one member ofthe drum .removed and showing a sectional view of the block forming part of the drum.

Fig. 5 is a cross section on line 5 510i Fig. 2.

Figs; 6A and 7 are front and sectional views of a. modilied form of my device, the modiication being mainly in the manner of construction. .of the drum.

Figs. 8 and9 are front and sectional views of a further modiication of my device, the

modification again being mainly in the rnan-l ner of construction of the drum. Figs. 10 and 11 show theA two arms which are attached to and'project from the drumA and .from the oscillatable spindle respectively.'

, The circular drum ma `be constructed in various ways and I wil first describe the construction shown in Figs. 2 to 5. According to this the drum comprises a short cylinder l closed at one'cnd except for A a central stuing box through which the spindle passes and open and externally ianged at the other end, together with a cover `2, the cover being secured to the cylinder by setscrews 3. The cylinder 1 has a lprojecting lperforated lug 4 to which is fastened by two bolts a projecting arm 5- pivotally attachedto the axle o r to the spring of the device.. The arm 5 carries a small lug 7 vehicle, according toA the positioning of the which fits into the perforation in the lug 4.

' Centrali positioned within the cylinder l is the spin le 8 the one end of which litsneatly against the'inner face of the-cover 2 while its other end passes through the stuffing box in the end of the cylinder.- A setscrew 6 at the'centre of the cover 2 maybe Aused to reduce the friction between the end of the spindle and the cover. Securely pinned or otherwise fastened upon-the projecting end the outer end of which is pivotally attached to the frame of the vehicle. Upon that portion of the spindle 8 within the drum' is formed or rigidly secured aradial plate l() to i Het.

l screwthreadled- 1head "criedby' an I'annular .projection '13 .upon

' adapted to tighten /the'packing 14 in an-an# i 'so `that it vcannot be loosened loy'fthesoScilla.-

nular recess cut in/jthespindle; Preferably this 'hushV l2 is'\provided'with"a locking" dvicffnot showin-engaging the projection 13 tion of the spindle.' :A short bush 0'1"Y collar which" the spindle oscillates. :I

l5 projects Ainwardly from thecylinder 'end v same recess vandformsi aguide about intothis within-the drum is a,- biock 19 thatfis v`:4se'icurelyi fastened-thereto softhat it 'Inoyes with the spacehetween the @walls of the, drum` v ebody `of the spindle I8 which carries y the radin; .plate 1o. Tinouglrniis' blockiti and forms a" fixed 'abutment across through thefsjmaller or` release' pas'sageBQ' e cylinder end jand l.

and consequently 'the movement hetwee fili-it should bedesired tousefthe' devices@ to assistforfsupplement they fpringsit is theV'l .spindle and thedrum' is 'slowedfjdown-"nd-g necessary `to closeuithe 'large'rjgpr j chargi-ng" -passage 23 byserewi'ng inthe setscrew 27.

Iltfis then 'necessary 3 .for vthe grease 'or oil` .to flow through the smaller passage v20jjand" '.1 eitheiychambexibecomes a compression'charn-` zber .according vtothe vmovementofthe Vehi- --cle' bod'yrelativelyfto the wheels.' 'The 'y charging-passage 2,3 may `bepartially .closed only' 'thereby alln'vv'ingA 'some ofi-'the greaseor vare twolpassages and 23, the one120a` if `is'cut av-.perforation which isjscrewthread-` f'edlaiid litted witha vsets'orewj27.which may beset' to. open or to'j'close vor @fclose Ithe passageas ,des'ired. `l iig 1" "Ixwill now describe 'the-operationv offrny` tted` 4with i al setscrew 22` whereby the" effectiveboreof the assag may be Varied `as idesired. .Into the c arglngpassa'ge 28 therev deyioe; the -arrows inl'Fig'. 4tiidicating'the.

" direction 'of moyement of the parts'when checkin a rebound. l The rum (that-is the two :chambers with grease.

When running over va smoothpieceof road to partially;v

finder'fbeng internally screwthreaded 1 nd u thei other-being externally screwthreade so :in- Figs'j'and 7 is much'v the samelfas .that

formed; b'ytwo short. cylinders '34"and 35 projecting'from' `two end-plates, 'the `Ono' Cyl'- 'that .the one vscrews into 'theothei--' Witha.

' grease-tight' joint'. '.lhe-twoend lplates' pref-l 'the' passage. 'Into the 'release passage 20" "thereis c ut` from -thejoutside'othe drum' f "l-.zja perforation which is screwthreadedandlfastenedf'together'by' ingl lugsl; wheieby l bolts or other means;

"one lof-such lugs being. of vvshape'to take'lthe construction the setserews' 22,25 and 27; `are in '.holes made throughjone oli the' I end-plates of the drum.` i

carried drum is formed Aloy two short@ cylinders 36' and 3 7 each 'open at'theone end, the `one .setsorews 222, 25 and V27 are .carried in holes ythe armsi and v'9 projecting from theI drum".

1 and fromthe spindle 8 respectively hold d I- the spindle 8 andlradial plate lQ'jin- Asuch position' relatively tothe drum'that ofthe,

f two jchambers between thefpl'aete .lO and the.,

"block V'19 the one; behindjtherplate-the compression chamber 30"-.is .of minimum-- capacity and fthe bulk. of the grease l is in.

fthey storage chamber 31;

strikes an obstruction' and rises'thespindle i the :grease endof'the- 8;' withthe plate .10 makes-a partialjrot'a.-

tion .within .theklrlnnpiny the 'directioninl.v zin-ga a. radial. piston', and removable arms passage 2,3 and passing I from the storage chamherl into the compression' A chamber l30.l vSo 'soon asthe rebound com As the" Wheel the. :dr-urny and. adapted tov oscil1at'e\'therein,

f perforated block secured within Vthe y'drum sand forming an abutmenttherein',:a radial dicatedby the arrow pointing to 'the'ri'ghtg-j opening the ball vvalye '241 at.. the-' tion, of the ro ectionof f-rnenees the spindle' 8- and' pla.te .'10'- com' P J fme'nce to vmove back as indicated bygthev l' arrowpointing to the left into normal posi!` tion but-,"as. thefballvalve 24 at once closes the 'passage 23, the grease can 'pass' onlyv the drumand adapte plate' secured upon the spindle Land forin-`` adaptedto be pivotally attached lrespectlively mountedfon the spindle and theogther the drum and bolted to .sald ^.-projectin. l f

2; An hydraulic valready described except` that the Adrum 'is 9 0 rably are provided lwith l suitable proj eet'- they lmay` bef rigidly to lthe axle or springend frame'gon'e' arm f being n Y vprovided rwith a lug itting 'in the perfora-l yshock absorber compris-v ing a circular drum and a 'spindle mounted within and projectin from -thecentre of' to oscllate" therein;

noe l lh'econst'ructono thedevice 'as shown. in Figs'. 8' and 49V is, alsosubstautially the 'same vasfthat-first described except tha-tthe n f projecting arms rigidly attached to the drum v and to the spindle the outer ends of which are adapted to 4be pivotally attached respectively tothe axle or to the spring and to ing two through passages the one a comparatively small one of' adjustable -bore and the lother a relatively large one fitted with a valve and with a device whereby it may be wholly or partially-closed, and a radial platesecured uponthe spindle and forming a radial piston within the cylinder, the block and the plate dividing' the interior voit the drum into two chambers which vary in relative size as the spindle with kthe plate oseillates within the drum, substantially as described and for the'purpose set forth.

`fort y In testimony that I claim the foregoing 3. `In an hydraulic shock absorber of the general construction described a block rigidly fastened within the drum and forming an abutment across the space between the Walls .of same and having two through passages the one a comparatively small one into whichprojects the end of a setscrewwhereby its eective `size may be varied,- and the v other one a comparatively large one at the one end of which is a balltvalve held by a retaining device in an enlarged portion ofthe passage, said passage being also fitted. y

with a setscrew` which may be set no more or less close the passage as desired, substan-- tall as described and lfor the purpose set as my invention l have signed my name this 20th day of September, 1926. v WUJLM PATRlCK tit. 

